Cindy has three marbles of the same size in her pocket, a green, a blue and a red marble. She puts her hand into her pocket and, without looking, takes out a red
marble.

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Ответ:

ferperez12

27.06.2020

Mathematics

Option A

${\pink{y = 13 \sqrt{2}}}$

Solution :-

$\sf{cosθ= \frac{ B}{C} }$

$\dashrightarrow \sf \: {cos45° = \frac{13}{y} }$

Multiply both sides by y:

$\sf \ \: y(cos45°) = 13y(cos45°)=13$

$\sf \: y ( \frac{ \sqrt{2} }{2} ) = 13$

$\implies \sf \: y = 13 \div \frac{ \sqrt{2} }{2}$

$\sf \implies \: y = 13 \times \frac{2}{ \sqrt{2} }$

$\implies \sf \: y = \frac{26}{ \sqrt{2} } ( \frac{ \sqrt{2} }{ \sqrt{2} } )$

$\implies \sf y = \frac{26 \sqrt{2} }{2}$

$\sf \boxed {\pink{y = 13 \sqrt{2}}}$

Question 11 Find the value of y. X+ 13 45° No links please! Thanks for the help!

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Cindy has three marbles of the same size in her pocket, a green, a blue and a red marble. She puts her hand into her pocket and, without looking, takes out a red marble.